Question

From a square cardboard a circle of biggest area was cut out. if the area of circle is 154*2, calculate the original area of the cardboard​

Answer 1

Answer:

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Step-by-step explanation:

Let r be the radius of the circle

here , area if circle = 154*2

πr² =154*2

r²=154*2/(22/7). [π = 22/7 ]

r²=98

r=√98

2r = diameter of circle =side of square cardboard

2*√98 = side of sq cardboard

therefore area of square cardboard= side²

= (2*√98)²

=4*98

= 392